I am trying to keep a close eye on both cats when they are near each other. The first time they met, Leo, the encumbent cat approached Tasha and they touched noses.
On another occasion Tasha came up behind Leo, when he was lying down with his back to her. I think she surprised him so he stood up, gave a bit of a hiss. They then both sat down, about two yards apart, facing me, and trying to look like they were ignoring each other.
This morning they had another encounter, this ended with Leo crouching down and turning round, still crouched and he left the room. I am surprised that Leo adopted what looks like a submissive posture. Also what does it mean when a cat yawns, I think someone told me once, that it is not that they are tired. Can anyone suggest sensible reasons for the above behaviour.